A minimal amount of 400g of fruits and vegetables per day (starch containing tubes excluded) is a natural source of valuable fibres, vegetable proteins and protective micronutrients
In nutrition, synergetic effects play an important role.
A minimal amount of 400g of fruits and vegetables per day (starch containing tubes excluded) is a natural source of valuable fibres, vegetable proteins and protective micronutrients.
Therefore, the consumption of fruits and vegetables can help to prevent us from major diseases (cardiovascular diseases) and certain cancers.
The kind of minerals and ions present in a fruit or vegetable also depend on the soil the plant is growing on.
Besides the natural minerals, fruit and vegetables can also contain highly toxic heavy metals as lead or mercury.
It's a matter of concentration, whether a metal is toxic or not: on one hand our body absolutely needs zinc as an essential trace element; on the other hand zinc being present in too high levels will interfere with the metabolism of other minerals in the body (iron and copper) and is under this circumstances toxic.
An important role also plays storage and conservation of fruits and vegetables which are also possible sources for contamination as in case of using tin plate for cans.
Reliable and well proven analysis of fruits and vegetables.
The vitamin C concentration in fruit as well as a huge number of anions and cations present in fruit can be determined by ion chromatography, titration or voltammetry/polarography.
Due to its high sensitivity, voltammetry and polarography are the first choice in trace metal analysis.
Titration on the other hand provides an easy and cheap way to analyse major minerals in fruits and vegetables.
When it comes to nitrate analysis or the analysis of different ions concomitantly, then ion chromatography plays its trump.
How much Vitamin C is in my pepper and tomato?.
Vitamin C is the L-enantiomer of ascorbic acid.
Our body cannot synthesize and store vitamin C.
Therefore it is essential to obtain it from the food we are consuming daily.
Ascorbic acid and its sodium, potassium and calcium salts possess antioxidant properties.
They can prevent reactive oxygen species (ROS, for example hydrogen peroxide) from damaging our body cells by taking up their reactive electrons.
Drinks, fruit and vegetable juices are natural sources of vitamin C.
Amongst vegetables, curly kale, paprika and tomatoes are very rich in vitamin C.
The content of vitamin C of vegetables, juices and other food can be determined by titration, ion chromatography or polarography.
Voltammetric analysis of vitamin C.
The analysis by polarography is very selective as other reducing or oxidizing substances do not interfere.
By using a 797 VA Computrace various polarographic and voltammetric methods are at hand and moreover you are given all the necessary electrodes for performing hundreds of applications.
Just a simple digestion is necessary prior to the determination of vitamin C in vegetables.
The analysis is done by differential pulse polarography (DPP) at a dropping mercury electrode (DME).
Just choose the method in the built-in database of your 797 VA Computrace.
With a single mouse click all settings are done and you can start measuring.
Product information.
MVA-2 system intended for partly automated routine analysis and consisting of the 797 VA Computrace and two 800 Dosinos.
MVA-2.
If you wish to automate fully the system then the MVA 3 option is available.
